• Female orgasm includes vaginal wall muscular contractions that produce pressure in vagina that is greater than in uterus which creates a pressure gradient that facilitates sperm movement through cervix

• Female orgasm can also cause the cervical os to dilate which allows the sperm to pass through more easily

Cervical sperm

• Cervical canal lined by folds & crypts withtiny cervical fibers

•Mucus is thick and fibers are denselypacked during most of menstrual cycle

• Shortly before ovulation, the estrogen riseswhich causes the the mucus to becomemore liquid and the gaps between the fibersto become wider